K.2 Series

How to mitigate Sound Propagation through Materials in Live Sound Settings

You may remember from your science classes in school that the speed of sound is a constant, but this statement is entirely dependent on the material through which sound is propagating. Different medium transmit sound at very different speeds. So, let’s look at some typical materials that most people would encounter in indoor live sound … Read More

Setting Subwoofer Level correctly in your PA System

Subwoofers are great solutions to extend the low frequency performance of your PA system, and there are three aspects to consider carefully when setting up a subwoofer. In the following order. Subwoofer Placement If subwoofers are used in many portable and installed PA applications to enhance the overall listening and performance experience, their placement in … Read More

What Causes Loudspeaker Hum and Hiss and How to eliminate it

If you are familiar attending any type of live show, concert or performance using PA loudspeakers, you will most likely also agree that loudspeakers’ humming, hissing or buzzing noise can quickly ruin a performance. This article reviews each of the common causes of audible (and irritating) loudspeakers’ hum and hiss, and discusses effective strategies to … Read More

Practical Tips on Loudspeaker Placement for Live Sound (Part IV)

Perhaps even more important than horizontal coverage is vertical coverage, where elevation and distance become critical. A large part of proper loudspeaker coverage is finding a balance between loudspeaker distance and volume. To a certain extent, having loudspeakers farther from the audience makes it easier to achieve consistent coverage, assuming you have sufficiently powerful loudspeakers … Read More

QSC Directivity Matched Transition technology explained

In the history of professional audio, the introduction of QSC Directivity Matched Transition® (DMT™) technology has been one of those ‘lightbulb moment’ innovations that forever changed how audiences experience sound. In order to fully grasp its benefits, and why DMT is foundational to QSC loudspeaker design, let’s start with some fundamentals of the physics of … Read More

What are the differences between passive, active and powered loudspeakers?

Whether you’re listening to live music in a club, to a film soundtrack at the movie theater, or enjoying some tunes while wearing headphones, the sound you’re listening to is reproduced by loudspeakers. Everyone understands that. Now, designing loudspeakers, which produce sounds that are accurate and enjoyable, can be done in a few different ways. … Read More

What is Comb Filtering and how to avoid it

Have you ever had an experience at a live event, like a concert or a show, where the sound seemed thin, lacking in punch and dynamics, or with a disturbing phasing effect as you moved around? If the sound system was comprised of a number of loudspeakers either stacked or placed side by side, or … Read More

Auditory Masking and its Effect on our Perception of Sound

What we hear is the complex combination of sound sources and their inherent audio characteristics interacting with the surrounding environment (in a room or outdoor), being decoded by our ears and brain. A number of loudspeakers and room-related topics have already been discussed in previous blogs (‘How to Best Setup Your Loudspeakers in Your Home … Read More